Runes: Never expire. Once purchased, they stay in your account until used.

Seals: It depends on how you earned them:

• From quests: expire after 14 days. Be sure to spend them before their individual timers run out!
• From Supporter Plans: expire after the plan duration ends (e.g., if you purchase a 90-day plan, bonus Seals expire after 90 days).
• From special events & sales: never expire, so you can save them for as long as you like.

Sigils: Sigils earned from watching ads expire 14 days after being earned. Sigils obtained from store events and promotions never expire.